General disc brake question

Anytime a conversion is contemplated, i.e. drum to disc, there are a number of factors to consider, including what you have readily available to you for the conversion.

My 1971 340 Duster came from the factory with the K-H 4 piston calipers and they work great. Rotors are available for $69 or less, you do have to look though and there are numerous threads in this specific forum with the availability info. The calipers can be rebuilt one time --- stainless steel inserts are available --- or you can just buy the Raybestos kits for rebuilding the piston bores, since these are the same as the early Mustang K-H calipers.

Remember, when you switch to the larger bolt pattern, i.e. the '73-'76 A body setup you get advantages and disadvantages. Advantages = greater availability of rotors at lower prices, same for calipers, pads, lines, bearings, etc. But you also have to factor in the cost to buy new wheels that are of the 4.5" bolt circle. Also a big advantage to the 4.5" is that the number of aftermarket wheels is enormous too.

I like my manual brake K-H setup; it works great and most of the parts are available via mailorder.